Electric-lamp socket



Sept. 2, 1924.

F. ORPEN ELECTRIC LAMP SQQKET Filed Avril 2. 1921 Inventor.

3 a) ja /1M Patented Sept. 2, 1924.

UNITED STATES PATENT OFFICE.

FREDERICK O'RPEN, OF TORONTO, ONTARIO, CANADA.

ELECTRIC-LAMP SOCKET.

Application filed April 2,

To all whom it may concern:

Be it known that I, Fnnnnnrox ORPEN, a subject of the King of Great Britain, and resident of the city of Toronto, county of York, Province of Ontario, in the Dominion of Canada, have invented certain new and useful Improvements in Electric-Lamp Sockets, described in the following specification and illustrated in the accompanying drawings, that form part of the same.

The principal objects of this invention are to reduce the cost of construction of electric lamp sockets and to provide a very simple but strong and durable structure.

The principal feature of the invention consists in the novel construction of the insulating member for supporting the electric connectlons and the lamp socket shell, whereby the said shell and fittings are supported upon an insulating disc and. whereby an insulating partition is interposed between the screws for connecting the wires.

In the drawings, Figure 1 is a longitudinal sectional view through a socket constructed according to this invention.

.Figure 2 is a perspective detail of the threaded shell and its supporting member.

. Figpre 3 is a view similar to Figure 2, seen om the opposite side. Figure 4 is a top plan view of the socket with the cap removed.

Figure 5 is an end view from the bottom end of the socket.

Figure 6 is a sectional detail showing a modification of the invention.

It has been the practice for many years to construct lamp sockets with a porcelain fitting connected to the inward end of the screw shell and the use of such material has been objectionable for many reasons owing to its fragile nature and on account of such conditions it has been impossible to tighten the members for holding the various connections in place in a satisfactory manner and it has become very common for sockets to become a danger on account of the loosening of screws and nuts holding the parts together.

The invention consists in securing to the closed end of the screw shell 1 a disc 2 of an insulating fibre and in order to ensure thor ough insulation, a secondary fibre member in the form of a semidisc 3 provided with an upward extensior 4 is placed over the disc'2 and rigidly secured in position by 1921. Serial No.' 457,979.

rivets 5. These rivets are arranged toward the sides of the discs and adjacent to the extension 4 of the disc 3 and extend through the end 6 of the shell 1 and also project through a bifurcated plate 7 arranged within the cup side of the shell 1.

' This latter plate is of brass and has a tongue portion 8 which extends through an opening 9 in the screw shell and carries a bindingscrew 10, it being thus electrically connected to the shell.

The discs 2 and 3 are cut away to clear the tongue 8 and binding screw 10.

At the other side of the insulating extension 4 and upon the top of the disc 2 is secured the contact tongue 11 which extends through a slot 12 in the disc 2 to form the central contact for the lamp. An angular plate 13 is secured to the inward portion of the tongue and both members are secured to the disc 2 by a rivet 14. A binding screw 15 is secured in the contact plate 13.

The usual mica insulating disc 16 is inserted into the shell between the plate '7 and the tongue.

It will be seen that the two contact members are separated from each other in a very effective manner and that on account of the simplicity of the structure with the flat, non-frangible materials used, the parts may be riveted securely to ether.

The extension 4 is an e ective insulating barrier between the two contact posts and this member is utilized for holding the wires, 9. pairof holes 17 being cut through the member 4 and the wires are inserted through these holes, one from either side of the plate.

The edges of the extension plate 4 are adapted to fit close to the inner side walls of the insulating jacket 18 of the socket and the upper end is formed with laterally extending lugs 19 which project into notches 20 cut in the upper edge of the socket shell 21 and the insulating jacket 18.

The disc 2 fits against the shoulder 22 of the socket shell and the socket cap 23 when placed in position engages the top edge of shell, a fibre sheet bent in right angular form having one portion thereof secured to said disc and the other portion extending transversely outward forming an insulating partition, a central electrical contact extending throu h and secured to said disc at one side of sad partition, and an electrical contact connected with the threaded shell acoa'oec extending through said disc on the other side of said partition.

2. In an electric lamp socket, the combination with the threaded sheet metal shell, of a disc of insulating material secured to the base of the shell and having a right angularly arranged central partltion extending therefrom, said partition having laterally extending lugs at the outward end, a socket shell adapted to enclose the threaded shell having notches in the side walls adapted to receive the lugs on said partition, and a cap adapted to engage the upper edge of said partition wall and to lock the insulating members and contacts carried thereby within the socket.

FREDERICK QRPEN. 

